1. General description

The 74ABT16240A is a 16-bit inverting buffer/line driver with 3-state outputs. The device can be

used as four 4-bit buffers, two 8-bit buffers or one 16-bit buffer. The device features four output

enables (1OE, 2OE, 3OE and 4OE), each controlling four of the 3-state outputs. A HIGH on nOE

causes the outputs to assume a high-impedance OFF-state. This device is fully specified for

partial power down applications using IOFF. The IOFF circuitry disables the output, preventing the

potentially damaging backflow current through the device when it is powered down.

2. Features and benefits

• Supply voltage range from 4.5 V to 5.5 V

• BiCMOS high speed and output drive

• Direct interface with TTL levels

• Power-up 3-state

• IOFF circuitry provides partial Power-down mode operation

• Latch-up protection exceeds 500 mA per JESD78B class II level A

• 16-bit bus interface

• Multiple VCC and GND pins minimize switching noise

• 3-state buffers

• TTL input and output switching levels

• Input and output interface capability to systems at 5 V supply

• Output capability: +64 mA and -32 mA

• Live insertion and extraction permitted

• ESD protection:

• HBM JESD-A114E exceeds 2000 V

• CDM JESD22-C101-C exceeds 1000 V